In the complex world of chemical sourcing, precision and accuracy are paramount. For procurement professionals, researchers, and formulation chemists, identifying and specifying chemical compounds correctly is the first and most critical step. This is where the Chemical Abstracts Service (CAS) Registry Number system plays an indispensable role. For specialized chemicals such as 1,2,3,4-Tetrahydro-6,7-dimethoxy-3-isoquinolinecarboxylic acid phenylmethyl ester hydrochloride, its CAS number – 103733-32-0 – is more than just an identifier; it's a guarantee of specificity and a passport for global trade.

What is a CAS Number?

A CAS Registry Number is a unique numerical identifier assigned by the Chemical Abstracts Service to every chemical substance described in the open scientific literature. These numbers are distinct, unambiguous, and universally recognized. They consist of three parts separated by hyphens: the first part contains up to seven digits, the second part contains two digits, and the third part is a single check digit. For example, CAS 103733-32-0 clearly identifies a specific chemical entity.

Why CAS Numbers are Crucial for Sourcing Photoresist Intermediates

When you are looking to buy a chemical like 1,2,3,4-Tetrahydro-6,7-dimethoxy-3-isoquinolinecarboxylic acid phenylmethyl ester hydrochloride, specifying the CAS number ensures that you are getting precisely the compound you need. This is especially vital for:

• Preventing Misidentification: Many chemicals share similar names or can have various synonyms. A CAS number eliminates ambiguity, ensuring you are not inadvertently ordering a different substance. This is critical for photoresist applications where impurities can have severe consequences.
• Ensuring Quality and Purity: When you request a quote from a manufacturer or supplier for a specific CAS number, you can be confident that they understand exactly what substance you require, allowing them to provide an accurate Certificate of Analysis (CoA) and verify its purity.
• Facilitating Global Trade and Regulatory Compliance: CAS numbers are recognized worldwide. They simplify customs procedures, regulatory documentation, and communication between international buyers and sellers. This is crucial when sourcing from a global supplier in China.
• Streamlining Research and Development: For scientists and researchers, using CAS numbers in literature searches, safety data sheets (SDS), and experimental protocols ensures accuracy and reproducibility.

How to Use CAS Numbers Effectively in Your Procurement Process

When sourcing any chemical, especially specialized ones like those for photoresist manufacturing, always:

• Include the CAS Number in Your Inquiry: When you contact a supplier to inquire about price or availability, always provide the CAS number. For example, when looking for 1,2,3,4-Tetrahydro-6,7-dimethoxy-3-isoquinolinecarboxylic acid phenylmethyl ester hydrochloride, state 'CAS 103733-32-0' clearly.
• Verify the CAS Number on Documentation: Always check that the CAS number listed on the quotation, invoice, and Certificate of Analysis matches the one you ordered.
• Use CAS Numbers for Cross-Referencing: When comparing offers from different suppliers, the CAS number is the most reliable point of comparison.

The CAS number system is a cornerstone of chemical information management and global commerce. By diligently using CAS numbers, you can enhance the precision, efficiency, and safety of your chemical procurement. We are committed to providing high-purity chemicals with accurate CAS identification, ensuring you receive the exact materials needed for your critical applications. Contact us today to order your required intermediates.